Csi report setting by the csi-transmitting user equipment

ABSTRACT

Some aspects provide a method for wireless communication by a first wireless device. The method generally includes transmitting control information regarding at least one of scheduling or configuration of a channel state information (CSI) report to be transmitted by the first wireless device. The method generally includes generating the CSI report based on one or more CSI reference signals (CSI-RSs) received by the first wireless device. The method generally includes and transmitting the CSI report in accordance with the control information.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application claims benefit of and priority to U.S. ProvisionalApplication No. 62/899,617, filed Sep. 12, 2019, which is herebyassigned to the assignee hereof and hereby expressly incorporated byreference herein in its entirety as if fully set forth below and for allapplicable purposes.

TECHNICAL FIELD

Aspects of the present disclosure relate to wireless communications, andmore particularly, to techniques for managing channel state information(CSI) reporting by a user equipment (UE), such as between UEs via asidelink channel.

BACKGROUND

Wireless communication systems are widely deployed to provide varioustelecommunication services such as telephony, video, data, messaging,broadcasts, etc. These wireless communication systems may employmultiple-access technologies capable of supporting communication withmultiple users by sharing available system resources (for example,bandwidth, transmit power, etc.). Examples of such multiple-accesssystems include 3rd Generation Partnership Project (3GPP) Long TermEvolution (LTE) systems, LTE Advanced (LTE-A) systems, code divisionmultiple access (CDMA) systems, time division multiple access (TDMA)systems, frequency division multiple access (FDMA) systems, orthogonalfrequency division multiple access (OFDMA) systems, single-carrierfrequency division multiple access (SC-FDMA) systems, and time divisionsynchronous code division multiple access (TD-SCDMA) systems, to name afew.

These multiple access technologies have been adopted in varioustelecommunication standards to provide a common protocol that enablesdifferent wireless devices to communicate on a municipal, national,regional, and even global level. New radio (for example, 5G NR) is anexample of an emerging telecommunication standard. NR is a set ofenhancements to the LTE mobile standard promulgated by 3GPP. NR isdesigned to better support mobile broadband Internet access by improvingspectral efficiency, lowering costs, improving services, making use ofnew spectrum, and better integrating with other open standards usingOFDMA with a cyclic prefix (CP) on the downlink (DL) and on the uplink(UL). To these ends, NR supports beamforming, multiple-inputmultiple-output (MIMO) antenna technology, and carrier aggregation.

However, as the demand for mobile broadband access continues toincrease, there exists a need for further improvements in NR and LTEtechnology. Preferably, these improvements should be applicable to othermulti-access technologies and the telecommunication standards thatemploy these technologies.

SUMMARY

The systems, methods, and devices of the disclosure each have severalinnovative aspects, no single one of which is solely responsible for thedesirable attributes. Without limiting the scope of this disclosure asexpressed by the claims which follow, some features will now bediscussed briefly. After considering this discussion, and particularlyafter reading the section entitled “Detailed Description” one willunderstand how the features of this disclosure provide advantages thatinclude improved sidelink channel state information (CSI) reporting.

Aspects of the disclosure can be implemented in a method for wirelesscommunication by a first wireless device. The method generally includestransmitting control information regarding at least one of scheduling orconfiguration of a CSI report to be transmitted by the first wirelessdevice. The method generally includes generating the CSI report based onone or more CSI reference signals (CSI-RSs) received by the firstwireless device. The method generally includes transmitting the CSIreport in accordance with the control information.

Aspects of the disclosure can be implemented in a method for wirelesscommunication by an apparatus. The method generally includes receiving,from a first wireless device, control information regarding at least oneof scheduling or configuration of a CSI report to be transmitted by thefirst wireless device. The method generally includes transmitting one ormore CSI-RSs to the first wireless device. The method generally includesreceiving the CSI report, from the first wireless device, in accordancewith the control information.

Aspects of the disclosure can be implemented in an apparatus forwireless communication by a first wireless device. The apparatusgenerally includes at least one processor configured to transmit controlinformation regarding at least one of scheduling or configuration of aCSI report to be transmitted by the first wireless device. The at leastone processor is configured to generate the CSI report based on one ormore CSI-RSs received by the first wireless device. The at least oneprocessor is configured to transmit the CSI report in accordance withthe control information. The apparatus generally includes a memorycoupled with the at least one processor.

Aspects of the disclosure can be implemented in an apparatus forwireless communication. The apparatus generally includes at least oneprocessor configured to receive, from a first wireless device, controlinformation regarding at least one of scheduling or configuration of aCSI report to be transmitted by the first wireless device. The at leastone processor is configured to transmit one or more CSI-RSs to the firstwireless device. The at least one processor is configured to receive theCSI report, from the first wireless device, in accordance with thecontrol information. The apparatus generally includes a memory coupledwith the at least one processor.

Aspects of the disclosure can be implemented in an apparatus forwireless communication. The apparatus generally includes means fortransmitting control information regarding at least one of scheduling orconfiguration of a CSI report to be transmitted by the first wirelessdevice. The apparatus generally includes means for generating the CSIreport based on one or more CSI-RSs received by the first wirelessdevice. The apparatus generally includes means for transmitting the CSIreport in accordance with the control information.

Aspects of the disclosure can be implemented in an apparatus forwireless communication. The apparatus generally includes means forreceiving, from a first wireless device, control information regardingat least one of scheduling or configuration of a CSI report to betransmitted by the first wireless device. The apparatus generallyincludes means for transmitting one or more CSI-RSs to the firstwireless device. The apparatus generally includes means for receivingthe CSI report, from the first wireless device, in accordance with thecontrol information.

Aspects of the disclosure can be implemented in a computer readablemedium storing computer executable code thereon for wirelesscommunication. The computer readable medium generally includes code fortransmitting control information regarding at least one of scheduling orconfiguration of a CSI report to be transmitted by the first wirelessdevice. The computer readable medium generally includes code forgenerating the CSI report based on one or more CSI-RSs received by thefirst wireless device. The computer readable medium generally includescode for transmitting the CSI report in accordance with the controlinformation.

Aspects of the disclosure can be implemented in a computer readablemedium storing computer executable code thereon for wirelesscommunication. The computer readable medium generally includes code forreceiving, from a first wireless device, control information regardingat least one of scheduling or configuration of a CSI report to betransmitted by the first wireless device. The computer readable mediumgenerally includes code for transmitting one or more CSI-RSs to thefirst wireless device. The computer readable medium generally includescode for receiving the CSI report, from the first wireless device, inaccordance with the control information.

To the accomplishment of the foregoing and related ends, the one or moreaspects comprise the features hereinafter fully described andparticularly pointed out in the claims. The following description andthe appended drawings set forth in detail some illustrative features ofthe one or more aspects. These features are indicative, however, of buta few of the various ways in which the principles of various aspects maybe employed.

BRIEF DESCRIPTION OF THE DRAWINGS

Details of one or more implementations of the subject matter describedin this disclosure are set forth in the accompanying drawings and thedescription below. However, the accompanying drawings illustrate onlysome typical aspects of this disclosure and are therefore not to beconsidered limiting of its scope. Other features, aspects, andadvantages will become apparent from the description, the drawings andthe claims.

FIG. 1 shows an example wireless communication network in which someaspects of the present disclosure may be performed.

FIG. 2 shows a block diagram illustrating an example base station (BS)and an example user equipment (UE) in accordance with some aspects ofthe present disclosure.

FIG. 3 is an example frame format for certain wireless communicationsystems (e.g., new radio (NR)), in accordance with certain aspects ofthe present disclosure.

FIG. 4 illustrates an example vehicle-to-everything (V2X) communicationsystem, in accordance with certain aspects of the present disclosure.

FIG. 5 illustrates another example V2X communication system, inaccordance with certain aspects of the present disclosure.

FIG. 6 is a flow diagram illustrating example operations for wirelesscommunication by a first wireless device in accordance with some aspectsof the present disclosure.

FIG. 7 is a flow diagram illustrating example operations for wirelesscommunication by an apparatus in accordance with some aspects of thepresent disclosure.

FIG. 8 is a call flow diagram illustrating example sidelink CSI reportconfiguration and reporting for wireless communication in accordancewith some aspects of the present disclosure.

FIG. 9 is a block diagram illustrating an example communications devicethat may include various components configured to perform operations forthe techniques disclosed herein in accordance with aspects of thepresent disclosure.

FIG. 10 is a block diagram illustrating an example communications devicethat may include various components configured to perform operations forthe techniques disclosed herein in accordance with aspects of thepresent disclosure.

To facilitate understanding, identical reference numerals have beenused, where possible, to designate identical elements that are common tothe figures. It is contemplated that elements disclosed in one aspectmay be beneficially utilized on other aspects without specificrecitation.

DETAILED DESCRIPTION

Aspects of the present disclosure provide apparatus, methods, processingsystems, and computer readable mediums for managing channel stateinformation (CSI) reporting, such as via a sidelink channel betweensidelink devices (e.g., user equipment (UE)). As will be described, thetechniques presented herein allow a CSI report transmitting UE toschedule and/or configure its own CSI report.

UEs may be configured to report some or all metrics for CSI reporting.Currently, there is no standalone reference signal (RS) transmissionscheme dedicated to this type of CSI reporting for sidelink channelsbetween devices. Allowing a UE to configure its own sidelink CSI reportsettings, as described herein, may allow the UE to tailor the metricsreported and/or resources to suit current conditions and needs. Thisflexibility may accommodate different sidelink use cases, which may havedifferent requirements in terms of delay constraints, complexity ofsignaling, and overhead that can be tolerated for CSI feedback.

The following description provides examples of sidelink CSI reportsetting, and is not limiting of the scope, applicability, or examplesset forth in the claims. Changes may be made in the function andarrangement of elements discussed without departing from the scope ofthe disclosure. Various examples may omit, substitute, or add variousprocedures or components as appropriate. For instance, the methodsdescribed may be performed in an order different from that described,and various steps may be added, omitted, or combined. Also, featuresdescribed with respect to some examples may be combined in some otherexamples. For example, an apparatus may be implemented or a method maybe practiced using any number of the aspects set forth herein. Inaddition, the scope of the disclosure is intended to cover such anapparatus or method which is practiced using other structure,functionality, or structure and functionality in addition to, or otherthan, the various aspects of the disclosure set forth herein. It shouldbe understood that any aspect of the disclosure disclosed herein may beembodied by one or more elements of a claim.

In general, any number of wireless networks may be deployed in a givengeographic area. Each wireless network may support a particular radioaccess technology (RAT) and may operate on one or more frequencies. ARAT may also be referred to as a radio technology, an air interface,etc. A frequency may also be referred to as a carrier, a subcarrier, afrequency channel, a tone, a subband, etc. Each frequency may support asingle RAT in a given geographic area in order to avoid interferencebetween wireless networks of different RATs. In some cases, a 5G NR RATnetwork may be deployed.

The techniques described herein may be used for various wirelessnetworks and radio technologies. While aspects may be described hereinusing terminology commonly associated with 3G, 4G, and/or new radio(e.g., 5G NR) wireless technologies, aspects of the present disclosurecan be applied in other generation-based communication systems.

NR access (for example, 5G NR) may support various wirelesscommunication services, such as enhanced mobile broadband (eMBB)targeting wide bandwidth, millimeter wave (mmWave) targeting highcarrier frequency, massive machine type communications MTC (mMTC)targeting non-backward compatible MTC techniques, or mission criticalservices targeting ultra-reliable low-latency communications (URLLC).These services may include latency and reliability requirements. Theseservices may also have different transmission time intervals (TTI) tomeet respective quality of service (QoS) requirements. In addition,these services may co-exist in the same time-domain resource (forexample, a slot or subframe) or frequency-domain resource (for example,component carrier).

FIG. 1 illustrates an example wireless communication network 100 inwhich aspects of the present disclosure may be performed. For example,as shown in FIG. 1, UE 120 a and/or UE 120 b may include a Sidelink CSIReport Module (122 a, 122 b), that may be configured to performoperations to manage sidelink CSI reporting as described herein.

As shown in FIG. 1, the wireless communication network 100 may be incommunication with a core network 132. The core network 132 may incommunication with one or more base station (BSs) 110110 a-z (each alsoindividually referred to herein as BS 110 or collectively as BSs 110)and/or user equipment (UE) 120 a-y (each also individually referred toherein as UE 120 or collectively as UEs 120) in the wirelesscommunication network 100 via one or more interfaces.

A BS 110 may provide communication coverage for a particular geographicarea, sometimes referred to as a “cell”, which may be stationary or maymove according to the location of a mobile BS 110. In some examples, theBSs 110 may be interconnected to one another or to one or more other BSsor network nodes (not shown) in wireless communication network 100through various types of backhaul interfaces (for example, a directphysical connection, a wireless connection, a virtual network, or thelike) using any suitable transport network. In the example shown in FIG.1, the BSs 110 a, 110 b and 110 c may be macro BSs for the macro cells102 a, 102 b and 102 c, respectively. The BS 110 x may be a pico BS fora pico cell 102 x. The BSs 110 y and 110 z may be femto BSs for thefemto cells 102 y and 102 z, respectively. ABS may support one ormultiple cells.

The BSs 110 communicate with UEs 120 in the wireless communicationnetwork 100. The UEs 120 may be dispersed throughout the wirelesscommunication network 100, and each UE 120 may be stationary or mobile.Wireless communication network 100 may also include relay stations (forexample, relay station 110 r), also referred to as relays or the like,that receive a transmission of data or other information from anupstream station (for example, a BS 110 a or a UE 120 r) and sends atransmission of the data or other information to a downstream station(for example, a UE 120 or a BS 110), or that relays transmissionsbetween UEs 120, to facilitate communication between devices.

A network controller 130 may couple to a set of BSs 110 and providecoordination and control for these BSs 110. The network controller 130may communicate with the BSs 110 via a backhaul. In aspects, the networkcontroller 130 may be in communication with a core network 132 (e.g., a5G Core Network (5GC)), which provides various network functions such asAccess and Mobility Management, Session Management, User Plane Function,Policy Control Function, Authentication Server Function, Unified DataManagement, Application Function, Network Exposure Function, NetworkRepository Function, Network Slice Selection Function, etc.

FIG. 2 illustrates example components of BS 110 a and UE 120 a (e.g.,the wireless communication network 100 of FIG. 1), which may be used toimplement aspects of the present disclosure.

At the BS 110 a, a transmit processor 220 may receive data from a datasource 212 and control information from a controller/processor 240. Thecontrol information may be for the physical broadcast channel (PBCH),physical control format indicator channel (PCFICH), physical hybrid ARQindicator channel (PHICH), physical downlink control channel (PDCCH),group common PDCCH (GC PDCCH), etc. The data may be for the physicaldownlink shared channel (PDSCH), etc. The processor 220 may process (forexample, encode and symbol map) the data and control information toobtain data symbols and control symbols, respectively. The transmitprocessor 220 may also generate reference symbols, such as for theprimary synchronization signal (PSS), secondary synchronization signal(SSS), and cell-specific reference signal (CRS). A transmit (TX)multiple-input multiple-output (MIMO) processor 230 may perform spatialprocessing (for example, precoding) on the data symbols, the controlsymbols, or the reference symbols, if applicable, and may provide outputsymbol streams to the modulators (MODs) in transceivers 232 a-232 t.Each modulator may process a respective output symbol stream (forexample, for OFDM, etc.) to obtain an output sample stream. Eachmodulator may further process (for example, convert to analog, amplify,filter, and upconvert) the output sample stream to obtain a downlinksignal. Downlink signals from the modulators in transceivers 232 a-232 tmay be transmitted via the antennas 234 a-234 t, respectively.

At the UE 120 a, the antennas 252 a-252 r may receive the downlinksignals from the BS 110 a (or sidelink signals from a sidelink device,such as UE 120 b) and may provide received signals to the demodulators(DEMODs) in transceivers 254 a-254 r, respectively. Each demodulator maycondition (for example, filter, amplify, downconvert, and digitize) arespective received signal to obtain input samples. Each demodulator mayfurther process the input samples (for example, for OFDM, etc.) toobtain received symbols. A MIMO detector 256 may obtain received symbolsfrom all the demodulators in transceivers 254 a-254 r, perform MIMOdetection on the received symbols if applicable, and provide detectedsymbols. A receive processor 258 may process (for example, demodulate,deinterleave, and decode) the detected symbols, provide decoded data forthe UE 120 a to a data sink 260, and provide decoded control informationto a controller/processor 280.

On the uplink or sidelink, at UE 120 a, a transmit processor 264 mayreceive and process data (for example, for the physical uplink sharedchannel (PUSCH) or the physical sidelink shared channel (PSSCH)) from adata source 262 and control information (for example, for the physicaluplink control channel (PUCCH) or physical sidelink control channel(PSCCH)) from the controller/processor 280. The transmit processor 264may also generate reference symbols for a reference signal (for example,for the sounding reference signal (SRS) or channel state informationreference signal (CSI-RS)). The symbols from the transmit processor 264may be precoded by a TX MIMO processor 266 if applicable, furtherprocessed by the modulators in transceivers 254 a-254 r (for example,for SC-FDM, etc.), and transmitted to the BS 110 a or sidelink UE 120 b.At the BS 110 a, the uplink signals from the UE 120 a may be received bythe antennas 234, processed by the demodulators 232, detected by a MIMOdetector 236 if applicable, and further processed by a receive processor238 to obtain decoded data and control information sent by the UE 120 a.The receive processor 238 may provide the decoded data to a data sink239 and the decoded control information to the controller/processor 240.

The memories 242 and 282 may store data and program codes for BS 110 andUE 120, respectively. A scheduler 244 may schedule UEs for datatransmission on the downlink or uplink.

Antennas 252, processors 266, 258, 264, and/or controller/processor 280of the UE 120 a and/or antennas 234, processors 220, 230, 238, and/orcontroller/processor 240 of the BS 110 a may be used to perform thevarious techniques and methods described herein. As shown in FIG. 2, thecontroller/processor 280 of the UE 120 a has a Sidelink CSI ReportModule 122 that may be configured to configure/schedule UE 120 s own CSIreport and/or process a sidelink CSI report from another UE. Althoughshown at the Controller/Processor, other components of the UE may beused to perform the operations described herein.

NR may utilize orthogonal frequency division multiplexing (OFDM) with acyclic prefix (CP) on the uplink and downlink. NR may supporthalf-duplex operation using time division duplexing (TDD). OFDM andsingle-carrier frequency division multiplexing (SC-FDM) partition thesystem bandwidth into multiple orthogonal subcarriers, which are alsocommonly referred to as tones, bins, etc. Each subcarrier may bemodulated with data. Modulation symbols may be sent in the frequencydomain with OFDM and in the time domain with SC-FDM. The spacing betweenadjacent subcarriers may be fixed, and the total number of subcarriersmay be dependent on the system bandwidth. The minimum resourceallocation, called a resource block (RB), may be 12 consecutivesubcarriers. The system bandwidth may also be partitioned into subbands.For example, a subband may cover multiple RBs. NR may support a basesubcarrier spacing (SCS) of 15 KHz and other SCS may be defined withrespect to the base SCS (e.g., 30 kHz, 60 kHz, 120 kHz, 240 kHz, etc.).

FIG. 3 is a diagram showing an example of a frame format 300 for NR. Thetransmission timeline for each of the downlink and uplink may bepartitioned into units of radio frames. Each radio frame may have apredetermined duration (e.g., 10 ms) and may be partitioned into 10subframes, each of 1 ms, with indices of 0 through 9. Each subframe mayinclude a variable number of slots (e.g., 1, 2, 4, 8, 16, . . . slots)depending on the SCS. Each slot may include a variable number of symbolperiods (e.g., 7, 12, or 14 symbols) depending on the SCS. The symbolperiods in each slot may be assigned indices. A mini-slot, which may bereferred to as a sub-slot structure, refers to a transmit time intervalhaving a duration less than a slot (e.g., 2, 3, or 4 symbols). Eachsymbol in a slot may indicate a link direction (e.g., DL, UL, orflexible) for data transmission and the link direction for each subframemay be dynamically switched. The link directions may be based on theslot format. Each slot may include DL/UL data as well as DL/UL controlinformation.

In some circumstances, two or more subordinate entities (for example,UEs) may communicate with each other using sidelink signals. Asdescribed above, V2V and V2X communications are examples ofcommunications that may be transmitted via a sidelink. Otherapplications of sidelink communications may include public safety orservice announcement communications, communications for proximityservices, communications for UE-to-network relaying, device-to-device(D2D) communications, Internet of Everything (IoE) communications,Internet of Things (IoT) communications, mission-critical meshcommunications, among other suitable applications. Generally, a sidelinkmay refer to a direct link between one subordinate entity (for example,UE1) and another subordinate entity (for example, UE2). As such, asidelink may be used to transmit and receive a communication (alsoreferred to herein as a “sidelink signal”) without relaying thecommunication through a scheduling entity (for example, a BS), eventhough the scheduling entity may be utilized for scheduling or controlpurposes. In some examples, a sidelink signal may be communicated usinga licensed spectrum (unlike wireless local area networks, whichtypically use an unlicensed spectrum).

Various sidelink channels may be used for sidelink communications,including a physical sidelink discovery channel (PSDCH), a physicalsidelink control channel (PSCCH), a physical sidelink shared channel(PSSCH), and a physical sidelink feedback channel (PSFCH). The PSDCH maycarry discovery expressions that enable proximal devices to discovereach other. The PSCCH may carry control signaling such as sidelinkresource configurations and other parameters used for datatransmissions, and the PSSCH may carry the data transmissions. The PSFCHmay carry feedback such as channel state information (CSI) related to asidelink channel quality.

FIG. 4 and FIG. 5 show diagrammatic representations of example vehicleto everything (V2X) systems in accordance with some aspects of thepresent disclosure. For example, the vehicles shown in FIG. 4 and FIG. 5may communicate via sidelink channels and may perform sidelink CSIreporting as described herein.

The V2X systems, provided in FIG. 4 and FIG. 5 provide two complementarytransmission modes. A first transmission mode, shown by way of examplein FIG. 4, involves direct communications (for example, also referred toas side link communications) between participants in proximity to oneanother in a local area. A second transmission mode, shown by way ofexample in FIG. 5, involves network communications through a network,which may be implemented over a Uu interface (for example, a wirelesscommunication interface between a radio access network (RAN) and a UE).

Referring to FIG. 4, a V2X system 400 (for example, including vehicle tovehicle (V2V) communications) is illustrated with two vehicles 402, 404.The first transmission mode allows for direct communication betweendifferent participants in a given geographic location. As illustrated, avehicle can have a wireless communication link 406 with an individual(V2P) (for example, via a UE) through a PC5 interface. Communicationsbetween the vehicles 402 and 404 may also occur through a PC5 interface408. In a like manner, communication may occur from a vehicle 402 toother highway components (for example, highway component 410), such as atraffic signal or sign (V2I) through a PC5 interface 412. With respectto each communication link illustrated in FIG. 4, two-way communicationmay take place between elements, therefore each element may be atransmitter and a receiver of information. The V2X system 400 may be aself-managed system implemented without assistance from a networkentity. A self-managed system may enable improved spectral efficiency,reduced cost, and increased reliability as network service interruptionsdo not occur during handover operations for moving vehicles. The V2Xsystem may be configured to operate in a licensed or unlicensedspectrum, thus any vehicle with an equipped system may access a commonfrequency and share information. Such harmonized/common spectrumoperations allow for safe and reliable operation.

FIG. 5 shows a V2X system 500 for communication between a vehicle 552and a vehicle 554 through a network entity 556. These networkcommunications may occur through discrete nodes, such as a BS (forexample, an eNB or gNB), that sends and receives information to and from(for example, relays information between) vehicles 552, 554. The networkcommunications through vehicle to network (V2N) links 558 and 510 may beused, for example, for long range communications between vehicles, suchas for communicating the presence of a car accident a distance aheadalong a road or highway. Other types of communications may be sent bythe node to vehicles, such as traffic flow conditions, road hazardwarnings, environmental/weather reports, and service stationavailability, among other examples. Such data can be obtained fromcloud-based sharing services.

Aspects of the present disclosure relate to channel state information(CSI) reporting between user equipments (UEs) via a sidelink channel.

CSI reporting configuration and scheduling in new radio (NR) may dependon the type of CSI reporting. The type of channel that carries the CSIreport may depend on the type of CSI reporting. For example, periodicCSI reporting is carried on short physical uplink control channel(PUCCH) or long PUCCH, while semi-persistent (SP) CSI reporting iscarried on long PUCCH or physical uplink shared channel (PUSCH).Resources and transmission parameters (such as modulation and codingscheme (MCS)) for SP CSI on PUSCH may be allocated semi-persistentlyusing downlink control information (DCI). SP CSI may support Type II CSIreporting with minimum periodicity of 5 ms. In some cases, SP CSIreporting may not be supported for aperiodic CSI reference signals(CSI-RS) (although lack of support does not preclude one CSI reportcarried by multiple UL reporting instances). In NR, aperiodic CSIreporting is carried on PUSCH multiplexed with or without uplink data.Periodic and semi-persistent (P/SP) reporting in NR may support thefollowing periodicities {5, 10, 20, 40, 80, 160, 320} slots.

CSI in NR includes a variety of channel quality metrics. For example,channel quality metrics may include Channel Quality Indicator (CQI);Precoding Matrix Indicator (PMI), channel state information referencesignal (CSI-RS) Resource Indicator (CRI), Strongest Layer Indication(SLI), Rank Indication (RI), and L1 reference signal receive power(L1-RSRP) (for beam management).

For V2X deployments, such as described with reference to FIGS. 4 and 5,CSI reporting can be enabled and disabled by configuration. Forflexibility, sidelink devices may be configured to report a subset ofthe channel quality metrics for CSI reporting. Currently, there is nostandalone RS transmission scheme dedicated to this type of CSIreporting for sidelink channels between devices.

Currently, there is limited sidelink CSI reporting. For example,sidelink CSI-RS may support CQI and/or RI measurement for no more thantwo ports. Sidelink CSI-RS may be confined within the PSSCH. However,more detailed CSI reporting may be desirable for beam management andMIMO. Various sidelink use cases may involve different CSI reportingprocedures (e.g., depending on the amount of required feedback and theavailable resources). There are differences between sidelink andconventional (Uu access link) CSI reporting. For example, CSI reportingis asymmetric on the Uu interface, where the gNB (in NR) schedules allCSI-RS and CSI reporting. In sidelink CSI reporting, however, therelation between transmitter and receiver is more symmetric (e.g., fromone UE to another UE).

Thus, allowing a UE to configure its own CSI report settings, asdescribed herein, is desirable for CSI reporting.

Example CSI Report Setting by the CSI-Transmitting UE

Aspects of the present disclosure provide channel state information(CSI) report setting by the CSI-transmitting user equipment (UE). Thisflexibility may accommodate the different use cases of sidelink, whichmay have different requirements in terms of delay constraints,complexity of signaling, and overhead that can be tolerated for CSIfeedback. Enabling the UE to configure its own CSI report settings, asdescribed herein, may allow the UE to tailor the metrics reported and/orresources to suit current conditions and needs.

FIG. 6 is a flow diagram illustrating example operations 600 forwireless communication, in accordance with certain aspects of thepresent disclosure. The operations 600 may be performed, for example, bya first sidelink device, such as a UE (e.g., by a UE 120 a of FIG. 1 toschedule and/or configure its own sidelink CSI report to a UE 120 b).The operations 600 may be implemented as software components that areexecuted and run on one or more processors (e.g., controller/processor280 of FIG. 2). Further, the transmission and reception of signals bythe UE in operations 600 may be enabled, for example, by one or moreantennas (e.g., antennas 252 of FIG. 2). In certain aspects, thetransmission and/or reception of signals by the UE may be implementedvia a bus interface of one or more processors (e.g.,controller/processor 280) obtaining and/or outputting signals.

Operations 600 begin, at 602, by transmitting control informationregarding at least one of scheduling or configuration of a CSI report tobe transmitted by the first wireless device. For example, the controlinformation may be sent to another UE via a sidelink channel and/or to abase station (e.g., a gNB) via an access link. At 604, the firstwireless device generates the CSI report based on one or more CSIreference signals (CSI-RSs) received by the first wireless device. At606, the first wireless device transmits the CSI report in accordancewith the control information. For example, the first wireless device maytransmit the CSI report to another UE via a sidelink and/or to a BS viaan access link.

FIG. 7 is a flow diagram illustrating example operations 700 forwireless communication, in accordance with certain aspects of thepresent disclosure. The operations 700 may be performed, for example, byan apparatus, such as a UE and/or a BS (e.g., by a UE 120 b and/or a BS110 a of FIG. 1 to process a CSI report configured/scheduled by a UE 120a). The operations 700 may be implemented as software components thatare executed and run on one or more processors (e.g.,controller/processor 280 of FIG. 2). Further, the transmission andreception of signals by the UE in operations 700 may be enabled, forexample, by one or more antennas (e.g., antennas 252 of FIG. 2). Incertain aspects, the transmission and/or reception of signals by the UEmay be implemented via a bus interface of one or more processors (e.g.,controller/processor 280) obtaining and/or outputting signals.

Operations 700 begin, at 702, by receiving, from a first wirelessdevice, control information regarding at least one of scheduling orconfiguration of a CSI report to be transmitted by the first wirelessdevice. At 704, the apparatus transmits one or more CSI-RSs to the firstwireless device. At 706, the apparatus receives the CSI report, from thefirst wireless device, in accordance with the control information.

Operations 600 and 700 of FIGS. 6 and 7 may be understood with referenceto the call flow diagram of FIG. 8, which shows a UE B 804 thatconfigures its own CSI report setting, in accordance with aspectsdescribed herein.

As illustrated, a UE A 802 transmits sidelink CSI-RS to UE B. In theillustrated example, UE B sends sidelink control information (SCI)scheduling data and the CSI report setting. As described in greaterdetail below, the SCI may configure/schedule the CSI reporting. Forexample, the SCI may indicate resources to be used for transmitting theCSI report and/or which metrics will be included therein. As shown inFIG. 8, UE B may then measure the CSI-RS, generate the CSI report, andsend the CSI report (and possibly data) in a physical sidelink sharedchannel (PSSCH) transmission to UE A, in accordance with the CSI reportsetting.

As in the example shown in FIG. 8, in some cases, the CSI report settingmay be configured dynamically by SCI. The SCI may be carried by physicalsidelink control channel (PSCCH) between the UEs. In other cases, theCSI report settings may be semi-statically configured via a sidelink RRCconfiguration.

According to certain aspects, the CSI report setting may indicate one ormore parameters for transmission of the CSI report on PSSCH, such as abeta factor, which may be included in the SCI. A beta factor (or factor\beta) for sidelink may be similar to the beta factor in 5G NR. The betafactor may modifies the transmit power when a PUSCH transmission carriesan uplink control indictor (UCI). The beta factor may determine thenumber of resources for transmitting CSI report on PSSCH.

In some examples, the CSI report transmitting-UE may indicate separateresources for CSI reporting and data. For example, a first set ofresources may be used for data and a second set of resources for CSIreporting.

In some examples, a physical sidelink broadcast channel (PSBCH) may beused to carry at least some CSI report setting configurationinformation. For example, resources and/or MCS for CSI reporting may beindicated by the PSBCH of the CSI transmitting-UE.

In some examples, the SCI may indicate only the presence of a CSI reportin resources that are already configured. For example, the resources mayalready be configured by a gNB via the access link. In some examples,the resources may already configured by the CSI transmitting-UE byPSBCH. In either case, the SCI may only indicate a CSI report is beingtransmitted using these already configured resources.

While aspects of the present disclosure involve sidelink CSI reporting,in some examples, the UE may send control information and/or CSIreporting to a network entity (e.g., a base station (BS)).

As described herein, allowing a UE to configure its own CSI reportsettings may help the UE accommodate different requirements in terms ofdelay constraints, complexity of signaling, and overhead that can betolerated for CSI feedback.

FIG. 9 illustrates a communications device 900 that may include variouscomponents (e.g., corresponding to means-plus-function components)configured to perform operations for the techniques disclosed herein,such as the operations illustrated in FIG. 6. The communications device900 includes a processing system 902 coupled to a transceiver 908 (e.g.,a transmitter and/or a receiver). The transceiver 908 is configured totransmit and receive signals for the communications device 900 via anantenna 910, such as the various signals as described herein. Theprocessing system 902 may be configured to perform processing functionsfor the communications device 900, including processing signals receivedand/or to be transmitted by the communications device 900.

The processing system 902 includes a processor 904 coupled to acomputer-readable medium/memory 912 via a bus 906. In certain aspects,the computer-readable medium/memory 912 is configured to storeinstructions (e.g., computer-executable code) that when executed by theprocessor 904, cause the processor 904 to perform the operationsillustrated in FIG. 6, or other operations for performing the varioustechniques discussed herein for managing CSI reporting between UEs via asidelink channel. In certain aspects, computer-readable medium/memory912 stores code 914 for transmitting control information regarding atleast one of scheduling or configuration of a CSI report to betransmitted by the first wireless device; code 916 for generating theCSI report based on one or more CSI-RSs received by the first wirelessdevice; and code 918 for transmitting the CSI report in accordance withthe control information. In certain aspects, the processor 904 hascircuitry configured to implement the code stored in thecomputer-readable medium/memory 912. The processor 904 includescircuitry 924 for transmitting control information regarding at leastone of scheduling or configuration of a CSI report to be transmitted bythe first wireless device; circuitry 926 for generating the CSI reportbased on one or more CSI-RSs received by the first wireless device; andcircuitry 928 for transmitting the CSI report in accordance with thecontrol information.

FIG. 10 illustrates a communications device 1000 that may includevarious components (e.g., corresponding to means-plus-functioncomponents) configured to perform operations for the techniquesdisclosed herein, such as the operations illustrated in FIG. 7. Thecommunications device 1000 includes a processing system 1002 coupled toa transceiver 1008 (e.g., a transmitter and/or a receiver). Thetransceiver 1008 is configured to transmit and receive signals for thecommunications device 1000 via an antenna 1010, such as the varioussignals as described herein. The processing system 1002 may beconfigured to perform processing functions for the communications device1000, including processing signals received and/or to be transmitted bythe communications device 1000.

The processing system 1002 includes a processor 1004 coupled to acomputer-readable medium/memory 1012 via a bus 1006. In certain aspects,the computer-readable medium/memory 1012 is configured to storeinstructions (e.g., computer-executable code) that when executed by theprocessor 1004, cause the processor 1004 to perform the operationsillustrated in FIG. 7, or other operations for performing the varioustechniques discussed herein for managing CSI reporting between UEs via asidelink channel. In certain aspects, computer-readable medium/memory1012 stores code 1014 for receiving, from a first wireless device,control information regarding at least one of scheduling orconfiguration of a CSI report to be transmitted by the first wirelessdevice; code 1016 for transmitting one or more CSI-RSs to the firstwireless device; and code 1018 for receiving the CSI report, from thefirst wireless device, in accordance with the control information. Incertain aspects, the processor 1004 has circuitry configured toimplement the code stored in the computer-readable medium/memory 1012.The processor 1004 includes circuitry 1024 for receiving, from a firstwireless device, control information regarding at least one ofscheduling or configuration of a CSI report to be transmitted by thefirst wireless device; circuitry 1026 transmitting one or more CSI-RSsto the first wireless device; and circuitry 1028 for receiving the CSIreport, from the first wireless device, in accordance with the controlinformation.

The techniques described herein may be used for various wirelesscommunication technologies, such as NR (for example, 5G NR), 3GPP LongTerm Evolution (LTE), LTE-Advanced (LTE-A), code division multipleaccess (CDMA), time division multiple access (TDMA), frequency divisionmultiple access (FDMA), orthogonal frequency division multiple access(OFDMA), single-carrier frequency division multiple access (SC-FDMA),time division synchronous code division multiple access (TD-SCDMA), andother networks. The terms “network” and “system” are often usedinterchangeably. A CDMA network may implement a radio technology such asUniversal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includesWideband CDMA (WCDMA) and other variants of CDMA. cdma2000 coversIS-2000, IS-95 and IS-856 standards. A TDMA network may implement aradio technology such as Global System for Mobile Communications (GSM).An OFDMA network may implement a radio technology such as NR (e.g. 5GRA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11(Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, etc. UTRA andE-UTRA are part of Universal Mobile Telecommunication System (UMTS). LTEand LTE-A are releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE,LTE-A and GSM are described in documents from an organization named “3rdGeneration Partnership Project” (3GPP). cdma2000 and UMB are describedin documents from an organization named “3rd Generation PartnershipProject 2” (3GPP2). NR is an emerging wireless communications technologyunder development.

In 3GPP, the term “cell” can refer to a coverage area of a Node B (NB)or a NB subsystem serving this coverage area, depending on the contextin which the term is used. In NR systems, the term “cell” and BS, nextgeneration NodeB (gNB or gNodeB), access point (AP), distributed unit(DU), carrier, or transmission reception point (TRP) may be usedinterchangeably. A BS may provide communication coverage for a macrocell, a pico cell, a femto cell, or other types of cells. A macro cellmay cover a relatively large geographic area (for example, severalkilometers in radius) and may allow unrestricted access by UEs withservice subscription. A pico cell may cover a relatively smallgeographic area and may allow unrestricted access by UEs with servicesubscription. A femto cell may cover a relatively small geographic area(for example, a home) and may allow restricted access by UEs having anassociation with the femto cell (for example, UEs in a Closed SubscriberGroup (CSG), UEs for users in the home, etc.). A BS for a macro cell maybe referred to as a macro BS. A BS for a pico cell may be referred to asa pico BS. ABS for a femto cell may be referred to as a femto BS or ahome BS.

A UE may also be referred to as a mobile station, a terminal, an accessterminal, a subscriber unit, a station, a Customer Premises Equipment(CPE), a cellular phone, a smart phone, a personal digital assistant(PDA), a wireless modem, a wireless communication device, a handhelddevice, a laptop computer, a cordless phone, a wireless local loop (WLL)station, a tablet computer, a camera, a gaming device, a netbook, asmartbook, an ultrabook, an appliance, a medical device or medicalequipment, a biometric sensor/device, a wearable device such as a smartwatch, smart clothing, smart glasses, a smart wrist band, smart jewelry(for example, a smart ring, a smart bracelet, etc.), an entertainmentdevice (for example, a music device, a video device, a satellite radio,etc.), a vehicular component or sensor, a smart meter/sensor, industrialmanufacturing equipment, a global positioning system device, or anyother suitable device that is configured to communicate via a wirelessor wired medium. Some UEs may be considered machine-type communication(MTC) devices or evolved MTC (eMTC) devices. MTC and eMTC UEs include,for example, robots, drones, remote devices, sensors, meters, monitors,location tags, etc., that may communicate with a BS, another device (forexample, remote device), or some other entity. A wireless node mayprovide, for example, connectivity for or to a network (for example, awide area network such as Internet or a cellular network) via a wired orwireless communication link. Some UEs may be consideredInternet-of-Things (IoT) devices, which may be narrowband IoT (NB-IoT)devices.

In some examples, access to the air interface may be scheduled. Ascheduling entity (for example, a BS) allocates resources forcommunication among some or all devices and equipment within its servicearea or cell. The scheduling entity may be responsible for scheduling,assigning, reconfiguring, and releasing resources for one or moresubordinate entities. That is, for scheduled communication, subordinateentities utilize resources allocated by the scheduling entity. Basestations are not the only entities that may function as a schedulingentity. In some examples, a UE may function as a scheduling entity andmay schedule resources for one or more subordinate entities (forexample, one or more other UEs), and the other UEs may utilize theresources scheduled by the UE for wireless communication. In someexamples, a UE may function as a scheduling entity in a peer-to-peer(P2P) network, or in a mesh network. In a mesh network example, UEs maycommunicate directly with one another in addition to communicating witha scheduling entity.

The methods disclosed herein comprise one or more steps or actions forachieving the methods. The method steps and/or actions may beinterchanged with one another without departing from the scope of theclaims. In other words, unless a specific order of steps or actions isspecified, the order and/or use of specific steps and/or actions may bemodified without departing from the scope of the claims.

As used herein, a phrase referring to “at least one of” a list of itemsrefers to any combination of those items, including single members. Asan example, “at least one of: a, b, or c” is intended to cover a, b, c,a-b, a-c, b-c, and a-b-c, as well as any combination with multiples ofthe same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b,b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c).

As used herein, the term “determining” may encompass one or more of awide variety of actions. For example, “determining” may includecalculating, computing, processing, deriving, investigating, looking up(for example, looking up in a table, a database or another datastructure), assuming and the like. Also, “determining” may includereceiving (for example, receiving information), accessing (for example,accessing data in a memory) and the like. Also, “determining” mayinclude resolving, selecting, choosing, establishing and the like.

As used herein, “or” is used intended to be interpreted in the inclusivesense, unless otherwise explicitly indicated. For example, “a or b” mayinclude a only, b only, or a combination of a and b. As used herein, aphrase referring to “at least one of” or “one or more of” a list ofitems refers to any combination of those items, including singlemembers. For example, “at least one of: a, b, or c” is intended to coverthe possibilities of: a only, b only, c only, a combination of a and b,a combination of a and c, a combination of b and c, and a combination ofa and b and c.

The various illustrative components, logic, logical blocks, modules,circuits, operations and algorithm processes described in connectionwith the implementations disclosed herein may be implemented aselectronic hardware, firmware, software, or combinations of hardware,firmware or software, including the structures disclosed in thisspecification and the structural equivalents thereof. Theinterchangeability of hardware, firmware and software has been describedgenerally, in terms of functionality, and illustrated in the variousillustrative components, blocks, modules, circuits and processesdescribed above. Whether such functionality is implemented in hardware,firmware or software depends upon the particular application and designconstraints imposed on the overall system.

Various modifications to the implementations described in thisdisclosure may be readily apparent to persons having ordinary skill inthe art, and the generic principles defined herein may be applied toother implementations without departing from the spirit or scope of thisdisclosure. Thus, the claims are not intended to be limited to theimplementations shown herein, but are to be accorded the widest scopeconsistent with this disclosure, the principles and the novel featuresdisclosed herein.

Additionally, various features that are described in this specificationin the context of separate implementations also can be implemented incombination in a single implementation. Conversely, various featuresthat are described in the context of a single implementation also can beimplemented in multiple implementations separately or in any suitablesubcombination. As such, although features may be described above asacting in particular combinations, and even initially claimed as such,one or more features from a claimed combination can in some cases beexcised from the combination, and the claimed combination may bedirected to a subcombination or variation of a subcombination.

Similarly, while operations are depicted in the drawings in a particularorder, this should not be understood as requiring that such operationsbe performed in the particular order shown or in sequential order, orthat all illustrated operations be performed, to achieve desirableresults. Further, the drawings may schematically depict one or moreexample processes in the form of a flowchart or flow diagram. However,other operations that are not depicted can be incorporated in theexample processes that are schematically illustrated. For example, oneor more additional operations can be performed before, after,simultaneously, or between any of the illustrated operations. In somecircumstances, multitasking and parallel processing may be advantageous.Moreover, the separation of various system components in theimplementations described above should not be understood as requiringsuch separation in all implementations, and it should be understood thatthe described program components and systems can generally be integratedtogether in a single software product or packaged into multiple softwareproducts.

1. An apparatus of wireless communication by a first wireless device,comprising: at least one processor configured to: transmit controlinformation regarding at least one of scheduling or configuration of achannel state information (CSI) report to be transmitted by the firstwireless device; generate the CSI report based on one or more CSIreference signals (CSI-RSs) received by the first wireless device; andtransmit the CSI report in accordance with the control information; anda memory coupled with the at least one processor.
 2. The apparatus ofclaim 1, wherein the control information indicates one or more signalquality metrics to be included in the CSI report.
 3. The apparatus ofclaim 1, wherein the control information indicates a beta factor that atleast one of: modifies a transmit power for transmitting the CSI reporton a physical sidelink shared channel (PSSCH), modifies the transmitpower for transmitting the CSI report on a physical uplink sharedchannel (PUSCH), or determines a number of resources for transmittingthe CSI report.
 4. The apparatus of claim 1, wherein the controlinformation indicates the CSI report is to be sent on resources separatethan resources allocated for sending data.
 5. The apparatus of claim 1,wherein: the one or more CSI-RSs are received from a second wirelessdevice; and the CSI report is sent to the second wireless device over asidelink data channel.
 6. The apparatus of claim 1, wherein the controlinformation is transmitted via a sidelink radio resource control (RRC)configuration for semi-static scheduling or configuration of the CSIreport.
 7. The apparatus of claim 1, wherein one or more parameters fortransmitting the CSI report are indicated via a sidelink broadcastchannel.
 8. The apparatus of claim 7, wherein the one or more parameterscomprise at least one of: resources for transmitting the CSI report or amodulation and coding scheme (MCS) for transmitting the CSI report. 9.The apparatus of claim 1, wherein the control information is transmittedas sidelink control information (SCI) over a sidelink control channel.10. The apparatus of claim 9, wherein the SCI indicates a presence ofthe CSI report in a pool of resources already configured forcommunication between the first wireless device and a second wirelessdevice.
 11. The apparatus of claim 10, wherein the pool of resources isconfigured by: a base station via an access link; or the first wirelessdevice.
 12. An apparatus of wireless communication, comprising: at leastone processor configured to: receive, from a first wireless device,control information regarding at least one of scheduling orconfiguration of a channel state information (CSI) report to betransmitted by the first wireless device; transmit one or more CSIreference signals (CSI-RSs) to the first wireless device; and receivethe CSI report, from the first wireless device, in accordance with thecontrol information; and a memory coupled with the at least oneprocessor.
 13. The apparatus of claim 12, wherein the controlinformation indicates one or more signal quality metrics to be includedin the CSI report.
 14. The apparatus of claim 12, wherein the controlinformation indicates a beta factor that at least one of: modifies atransmit power for transmitting the CSI report on a physical sidelinkshared channel (PSSCH), modifies the transmit power for transmitting theCSI report on a physical uplink shared channel (PUSCH), or determines anumber of resources for transmitting the CSI report.
 15. The apparatusof claim 12, wherein: the control information indicates the CSI reportis to be sent on resources separate than resources allocated for sendingother data; and the apparatus monitors the separate resources for theCSI report and data.
 16. The apparatus of claim 12, wherein: theapparatus comprises a second wireless device; and the CSI report isreceived from the first wireless device over a sidelink data channel.17. The apparatus of claim 12, wherein the control information isreceived via a sidelink radio resource control (RRC) configuration forsemi-static scheduling or configuration of the CSI report.
 18. Theapparatus of claim 12, wherein one or more parameters for transmittingthe CSI report are received via a sidelink broadcast channel.
 19. Theapparatus of claim 18, wherein the one or more parameters comprise atleast one of: resources for receiving the CSI report or a modulation andcoding scheme (MCS) for receiving the CSI report.
 20. The apparatus ofclaim 16, wherein the control information is received as sidelinkcontrol information (SCI) over a sidelink control channel.
 21. Theapparatus of claim 20, wherein the SCI indicates a presence of the CSIreport in a pool of resources already configured for communicationbetween the first wireless device and a second wireless device.
 22. Theapparatus of claim 21, wherein the pool of resources is configured by: abase station via an access link; or the first wireless device.
 23. Amethod of wireless communication by a first wireless device, the methodcomprising: transmitting control information regarding at least one ofscheduling or configuration of a channel state information (CSI) reportto be transmitted by the first wireless device; generating the CSIreport based on one or more CSI reference signals (CSI-RSs) received bythe first wireless device; and transmitting the CSI report in accordancewith the control information.
 24. The method of claim 23, wherein thecontrol information indicates a beta factor that at least one of:modifies a transmit power for transmitting the CSI report on a physicalsidelink shared channel (PSSCH), modifies the transmit power fortransmitting the CSI report on a physical uplink shared channel (PUSCH),or determines a number of resources for transmitting the CSI report. 25.The method of claim 23, wherein: the one or more CSI-RSs are receivedfrom a second wireless device; and the CSI report is sent to the secondwireless device over a sidelink data channel.
 26. The method of claim23, wherein the control information is transmitted as sidelink controlinformation (SCI) over a sidelink control channel, wherein the SCIindicates a presence of the CSI report in a pool of resources alreadyconfigured for communication between the first wireless device and asecond wireless device.
 27. A method of wireless communication by anapparatus, the method comprising: receiving, from a first wirelessdevice, control information regarding at least one of scheduling orconfiguration of a channel state information (CSI) report to betransmitted by the first wireless device; transmitting one or more CSIreference signals (CSI-RSs) to the first wireless device; and receivingthe CSI report, from the first wireless device, in accordance with thecontrol information.
 28. The method of claim 27, wherein the controlinformation indicates a beta factor that at least one of: modifies atransmit power for transmitting the CSI report on a physical sidelinkshared channel (PSSCH), modifies the transmit power for transmitting theCSI report on a physical uplink shared channel (PUSCH), or determines anumber of resources for transmitting the CSI report.
 29. The method ofclaim 27, wherein: the apparatus comprises a second wireless device; andthe CSI report is received from the first wireless device over asidelink data channel.
 30. The method of claim 29, wherein the controlinformation is as sidelink control information (SCI) over a sidelinkcontrol channel.